12669209 has 4 divisors (see below), whose sum is σ = 14479104. Its totient is φ = 10859316.

The previous prime is 12669197. The next prime is 12669211. The reversal of 12669209 is 90296621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12669209 - 2⁴ = 12669193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12669229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904937 + ... + 904950.

It is an arithmetic number, because the mean of its divisors is an integer number (3619776).

Almost surely, 2^12669209 is an apocalyptic number.

It is an amenable number.

12669209 is a deficient number, since it is larger than the sum of its proper divisors (1809895).

12669209 is an equidigital number, since it uses as much as digits as its factorization.

12669209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809894.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 12669209 is about 3559.3832330897. The cubic root of 12669209 is about 233.1219498292.

The spelling of 12669209 in words is "twelve million, six hundred sixty-nine thousand, two hundred nine".